pll fundamentals

Each PLL has three global clock networks, but one of them (C3) can also be used as an external clock (at the same time) Does it mean that C0 C1 can only be used as a global clock, but not an external clock ??? The actual test can be used as an external tell me why? (1) After reading so many calls, I still don't understand the concept of resetting the clock pin, what is the global clock, and clk0 ~ What is clk7 ??? (2) General

The PLL is actually a negative feedback system that synchronizes the clock on the circuit with the phase of an external clock The PLL phase-locked loop has three components:Phase detector PD, loop filter lf and voltage controlled oscillator VCO Principle: The external input reference signal is used to control the frequency and phase of the internal oscillation signal in the loop.PD, which detects

PLL and CLK Classification By default, the operating frequency of the S3C2410 CPU is 12 MHz. The PLL circuit can generate a higher clock speed for the CPU and peripheral devices. The S3C2410 has two PLL: MPLL and UPLL, which are dedicated to UPLL and USB devices. MPLL is used for CPU and other peripheral devices. MPLL generates three clock frequencies: FCLK, HCLK

application implements the operation of the computer by calling it. And most of the WIN32 subsystem APIs are implemented through NATIVEAPI. the settings for NATIVEAPI are based on version compatibility considerations. It enters into kernel mode by means of software interrupts. Here are a few important concepts:Virtual Memory Management: The concept of virtual memory is introduced into Windows, and then the physical memory and virtual memory are associated with some kind of mapping. Each process

execution path; the so-called execution path refers to the directory list where the operating system searches for a local executable file.The same level directory in Jdk\bin contains the Src.zip file, which is the source code for all public classesGet more source code (compilers, virtual machines, local methods, and private helper classes, etc.) with access to: Oracle.net.Here is the anatomy of the JDK section:The difference between the JDK and the JRE can be seen clearly:There are three types

); Value = B.array (); Zk.create (root + "/element", Value, ZooDefs.Ids.OPEN_ACL_UNSAFE, createmode.persistent_sequential); return true; }Listing 7. Consumer Codeint consume () throws Keeperexception, interruptedexception{ int retvalue =-1; Stat stat = null; while (true) { synchronized (mutex) { list Back to top of pageSummarizeZookeeper, a sub-project in the Hadoop project, is an essential module

permission list on database name. Table name to user name @localhost identified by ' password '2.8.1 Permissions ListInsert: AddDelete: RemoveUpdate: ModifySelect: QueryGrant SELECT on nsd.* to [email protected] identified by ' 456 ' #lisi用户在本地登录后拥有对nsd库的所有表的查询权限Select User,password from Mysql.user where user= ' Lisi ';2.9 Modification of the database 2.9.1 Insert base values (6, ' Barbara ', 123456);Add a table record, Id=6,name=barbara, password =1234562.9.2 Insert Location VALUES (6, ' Sunny

This article mainly introduces C # Fundamentals in ASP. Have a certain reference value, followed by a small series to see it? Description: As a development framework, ASP is now widely used, the basis of its development in addition to the front-end HTML, CSS, JavaScript and other back-end most important language support or C #, The following will be the main use of the basic knowledge to do a summary, aspects of the study behind. C # is an object-orie

-dos disk operating system. It is worth mentioning that MS-DOS, which is the operating system running on IBM-PC and its compatible machine, later, Microsoft acquired the patent of the operating system, is equipped with the IBM-PC machine, and named Pc-dos. In 1987, the ms-dos3.3 version released by Microsoft was a very mature and reliable DOS version.Modern operating systems also have to go to many of the typical representative, such as: Windows, OS/2 and so on.I first write a blog, time is comp

^5. Procedure: Put on the operating system, as long as not delete it has been there. Execute the entrance, process: There is a life cycle, a certain time after the disappearance.6. Library: A bunch of programs, they can not execute independently, only provide the calling interface, can be executed by the program call.7. Operating system: With the operating system, any process to deal with the hardware, all have to go through the operating system. The operating system passes the lowest-level invo

(recommended range: 4KB Tracker and Storage synchronization mechanismsUpload and download7, the shell principle of operation 8, the principle of DDoS9. Cross-Station * * *The principle is to enter (incoming) malicious HTML code into a Web site with an XSS vulnerability, and when other users browse the site, the HTML code is automatically executed to achieve the purpose. For example, theft of user cookies, destruction of page structure, redirection to other websites, etc. Never trust the user's

crystal oscillator or the internal circuit of the PLL, wiring has no effect on it. Skew is different from the delay of the arrival of the clock rising along different paths caused by different cabling lengths.Title: What is metastable, what causes it, and how is it eliminated?Metastable: means that a trigger cannot reach a certain state within a specified time period.Cause: Because the trigger's tsu and th are not satisfied, when the trigger enters t

"Lan Unity Development Fundamentals II "Class 4 classes and objectsFirst, classes and objectsClass: The function of a class is to classifyA class is used to abstract the characteristics and behavior of an object.Classes are abstractions used to describe behaviors that have the same characteristicsSecond, define a classDefine a new type using the class keywordAccess modifier Class class name {class member ...}public class person{string name;}Third, O

Http://blog.sina.com.cn/s/blog_8173443e010160b8.htmlCSS frameworks have been around for a long time, and the usefulness of these frameworks has been discussed many times. Some people say that the CSS framework is not advanced enough, others say that these frameworks greatly save their development time. Here, we will not discuss this issue.A while ago, I learned about CSS frameworks. I like the 960CSS frame best.This tutorial will explain the fundamentals